Marathon Computer UNIPRO V3.5 - Manual (Page 187)

MMI Product Documentation
Unipro 3.5 Process Control 1 Aug. 1997
The Events Buss allows the Controller to receive and/or
transmit discrete events in time. The XMT and REC LEDs
indicate whether the OPTOMUX is transmitting or receiving
data. (These LEDs should never be on at the same time.) This
actual input/output switching is executed by the OPTOMUX
board: see “Setup and Configuration” or “Programmer
Operations” or the OPTO22 manual for specific details.
Slave Buss
The slave buss is a broadcast only communications buss.
Broadcast Mode
The slave buss broadcasts the UNIPRO setpoint using the
10PRO broadcast protocol. The broadcast protocol format is
similar to the message protocol format. Its form is
?AIddddDLE
where
?= 10PRO address
symbol
A=
Using 10PRO
I= Sending Setpoint
dddd= Data for Setpoint